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AMD 64-Bit Technology - ECE User Home Pages

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26568—Rev. 3.02—August 2002<br />

<strong>AMD</strong> <strong>64</strong>-<strong>Bit</strong> <strong>Technology</strong><br />

UNPCKHPS<br />

Unpack High Single-Precision Floating-Point<br />

Unpacks the high-order single-precision floating-point values in the first and second<br />

source operands and packs them into interleaved doublewords in the destination (first<br />

source). The low-order quadwords of the source operands are ignored. The first<br />

source/destination operand is an XMM register. The second source operand is another<br />

XMM register or 128-bit memory location.<br />

Mnemonic Opcode Description<br />

UNPCKHPS xmm1, xmm2/mem128 0F 15 /r Unpacks high-order single-precision floating-point values in an<br />

XMM register and another XMM register or 128-bit memory<br />

location and packs them into the destination XMM register.<br />

xmm1<br />

xmm2/mem128<br />

127 96 95 <strong>64</strong> 63 0<br />

127 96 95 <strong>64</strong> 63 0<br />

copy<br />

copy<br />

copy<br />

copy<br />

127 96 95 <strong>64</strong> 63 32 31<br />

0<br />

unpckhps.eps<br />

Related Instructions<br />

UNPCKHPD, UNPCKLPD, UNPCKLPS<br />

rFLAGS Affected<br />

None<br />

MXCSR Flags Affected<br />

None<br />

UNPCKHPS 389

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